639280798

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{311237}}^1$

素因数の和:311331

約数の個数: 16

約数和(自身を含む): 1045759680

約数和(自身を除く): 406478882

約数列:

[1, 2, 13, 26, 79, 158, 1027, 2054, 311237, 622474, 4046081, 8092162, 24587723, 49175446, 319640399, 639280798]

約数ペア:

[(1, 639280798), (2, 319640399), (13, 49175446), (26, 24587723), (79, 8092162), (158, 4046081), (1027, 622474), (2054, 311237)]